This is a unique Micro-Bin system. It's a retrofit of an already-existing barn/shed space. Lynn N. has three horses and believes O2Compost to be the "best solution out there for dealing with the constant output of manure. We are very pleased with the O2Compost system! We have no smell, less flies, and the barn manager is eager to sell his product to gardeners in our area. It's great incentive for him to keep the barn and pastures clean."